<?php 
/**
 * MyLoginForm class.
 * MyLoginForm is the data structure for keeping
 * user login form data. It is used by the 'login' action of 'SiteController'.
 */
class MyLoginForm extends CFormModel
{
	public $username;
	public $password;
	public $rememberMe;

	private $_identity;

	/**
	 * Declares the validation rules.
	 * The rules state that username and password are required,
	 * and password needs to be authenticated.
	 */
	public function rules()
	{
		return array(
			array('username,password','required'),
			array('rememberMe','boolean'),
			array('password','authenticate'),
		);
	}

	/**
	 * Declares attribute labels.
	 */
	public function attributeLabels()
	{
		return array(
			'username'=>Yii::t('login','用户名'),
			'password'=>Yii::t('login','密码'),
			'rememberMe'=>Yii::t('login','自动登录'),
		);
	}

	/**
	 * Authenticates the password.
	 * This is the 'authenticate' validator as declared in rules().
	 */
	public function authenticate($attribute,$params)
	{
		if(!$this->hasErrors())
		{
			$this->_identity = new UserIdentity($this->username,$this->password);
			if(!$this->_identity->authenticate())
			{
				$this->addError('password','Incorrect username or password');
			}
		}
	}

	/**
	 * Logs in the user using the given username and password in the model.
	 * @return boolean whether login is successful
	 */
	public function login()
	{
		if($this->_identity === null)
		{
			$this->_identity = new UserIdentity($this->username,$this->password);
			$this->_identity->authenticate();
		}

		if($this->_identity->errorCode === UserIdentity::ERROR_NONE)
		{
			$duraction = $this->rememberMe ? 3600 * 24 * 30 : 0;
			Yii::app()->user->login($this->_identity,$duraction);
			return true;
		}
		else
			return false;
	}
}